Quote Originally Posted by jamesnelizabeth View Post
....what compression ration would be good for this on premium pump gas?
James,
Something to consider, "premium" pump gas varies from place to place, so if you're planning on this being a driver any distance from home you might want to dial back the compression to something that supports say 89 octane. Around here there are only a handful of stations that sell premium ethanol free, and they may disappear soon. The octane of the premium ethanol blends varies from 91 to 93, which is a pretty wide range as it affects timing.

I'll butt out now, and let you get the answers you want.